exaptation
noun
ex·ap·ta·tion
ˌeg-ˌzap-ˈtā-shən
ex- + adaptation
first known use: 1981
Merriam-Webster
a trait, feature, or structure of an organism or taxonomic group that takes on a function when none previously existed or that differs from its original function which had been derived by evolution
Word history
Merriam-Webster traces the term to Stephen Jay Gould’s 1981 Tinbergen Lecture. Gould and Elisabeth S. Vrba developed it in their 1982 Paleobiology paper, “Exaptation—A Missing Term in the Science of Form.”
